Coupling High-Performance Thin-Layer Chromatography with Bacterial Genotoxicity Bioreporters

Area of Science:

• Environmental Science
• Biotechnology
• Toxicology

Background:

• Assessing genotoxicity in complex environmental samples is challenging.
• Existing methods often require extensive chemical analysis.
• There is a need for rapid, sensitive detection of DNA-damaging agents.

Purpose of the Study:

• To develop and validate an innovative technological platform for monitoring direct genotoxicity.
• To utilize bioluminescent Escherichia coli bioreporters on a high-performance thin-layer chromatography (HPTLC) plate.
• To identify specific genotoxic components in environmental samples without comprehensive chemical analysis.

Main Methods:

• Employing genetically engineered Escherichia coli sensor strains harboring luxABCDE gene fusions.
• Integrating these bioreporters with HPTLC for sample separation.
• Measuring increased luminescence as an indicator of DNA-damaging compounds.

Main Results:

• Demonstrated a quantifiable, dose-dependent response to model genotoxicants.
• Successfully identified specific genotoxic components in wastewater treatment plant influent and effluent samples.
• Validated the platform's applicability for complex environmental matrices.

Conclusions:

• The developed platform offers a sensitive and specific method for direct genotoxicity monitoring.
• This approach simplifies the assessment of environmental samples, reducing the need for complex chemical characterization.
• The technology holds promise for improved environmental risk assessment and monitoring strategies.